High-Cov ntsiab lus ntawm theem
API 5L Qib B PSL1yog tus qauv specification rau seamless thiab welded steel yeeb nkab siv nyob rau hauv pipeline tsheb thauj mus los systems nyob rau hauv cov roj av thiab natural gas industries. Nws sawv cev rau qhov sib npaug zoo ntawm lub zog, weldability, thiab tus nqi -kev ua tau zoo rau qis- rau - cov ntawv thov siab nruab nrab.
Cov ncauj lus kom ntxaws
1. API 5L
Qhov no sawv rau"American Petroleum Institute Specification 5L". Qhov no yog tus txheej txheem tswj hwm uas txhais cov kev tsim khoom, tshuaj lom neeg, thiab cov khoom siv rau cov kab yeeb nkab siv nyob rau hauv lub zog sector. Nws ua kom muaj kev sib luag, kev nyab xeeb, thiab kev ntseeg siab thoob plaws ntiaj teb cov saw hlau.
2. Qib B
Qhov no yog hais txog lubyam tsawg kawg nkaus yield zogntawm cov hlau.
Yam tsawg kawg nkaus Yield Strength:35,000 psi (241 MPa)
Yam tsawg kawg Tensile Strength:60,000 psi (414 MPa)
"Qib B" yog qib feem ntau rau cov dav dav - lub hom phiaj, qis - cov kav dej siab. Nws muab kev sib xyaw ua ke zoo ntawm lub zog thiab formability.
3. PSL1 (Cov Khoom Qhia Tshwj Xeeb Qib 1)
PSL txhais cov txheej txheem yuav tsum tau ua, ntxiv rau.PSL1 yog tus qauv, theem pibntawm kev xav tau. Cov kav dej uas muaj PSL2 tsim muaj cov kev cai nruj dua rau chemistry, toughness, thiab kuaj.
Cov yam ntxwv tseem ceeb ntawm PSL1:
Chemistry:Muaj kev txwv dav rau cov ntsiab lus xws li Carbon (C), Manganese (Mn), thiab lwm yam. Nws kuj tseem tso cai rau cov ntsiab lus ntawm Phosphorus (P) thiab Sulfur (S) ntau dua, uas tuaj yeem txo qis me ntsis weldability thiab toughness piv rau PSL2.
Toughness: Tsis tas yuav tsum muaj kev cuam tshuam toughness kuaj (Charpy Test). Cov yeeb nkab tsis tau lees tias yuav ua tau nyob rau hauv qis - qhov kub thiab txias ib puag ncig uas muaj kev cuam tshuam tawg.
Kev kuaj:Yuav tsum tau kuaj cov qauv hydrostatic thiab tsis yog -kev ntsuas hluav taws xob puas tsuaj.
Dimensional Tolerances:Standard tolerances rau qhov ntev xws li sab nraud txoj kab uas hla thiab phab ntsa thickness.
Ntsiab Specifications & Properties
| Khoom | Specification rau API 5L Qib B PSL1 |
|---|---|
| Txuj | API 5L (Liab tsab yog API 5L 46th Edition) |
| Qib | B |
| PSL | 1 |
| Min. Yield zog | 35,000 psi (241 MPa) |
| Min. Tensile zog | 60,000 psi (414 MPa) |
| Cov ntsiab lus carbon (Max) | 0.22% (rau seamless), 0.24% (rau welded) |
| Kev Xeem Toughness | Tsis xav tau |
| Qhov Loj | Muaj nyob rau hauv ntau qhov ntau thiab tsawg, los ntawm NPS 1/2 "mus rau 48" thiab loj dua. |
| Hom Phab Ntsa Thickness | Muaj nyob rau hauv tus qauv (STD), ntxiv - muaj zog (XS), thiab ob npaug - ntxiv - muaj zog (XXS), thiab lwm yam. |
Cov txheej txheem tsim khoom
API 5L Qib B PSL1 yeeb nkab tuaj yeem tsim nyob rau hauv ob txoj hauv kev:
Seamless (S): Ua los ntawm kev tho ib qho khoom siv hlau los tsim lub plhaub hollow. Nws tsis muaj welded seam thiab feem ntau yog siv rau siab dua - daim ntawv thov siab los yog qhov uas qhov kev pheej hmoo ntawm seam tsis ua hauj lwm yog ib qho kev txhawj xeeb tseem ceeb.
Welded (W): Ua los ntawm steel phaj los yog coil (skelp) thiab ces welded raws nws ntev. Cov hom muaj xws li:
ERW (Electric Resistance Welded):Feem ntau rau cov kab me me.
SAW (Submerged Arc Welded):Siv rau cov kav dej loj dua (piv txwv li, tshaj 16 ntiv tes).
Hom yeeb nkab yuav raug cim rau ntawm cov yeeb nkab li "S" lossis "W".
Cov ntawv thov siv
Cov yeeb nkab no yog cov neeg ua haujlwm rau ntau qhov kev lag luam vim nws cov nqi -kev ua tau zoo thiab kev ntseeg siab rau cov qauv kev ua haujlwm.
Onshore thiab Offshore Roj & Gas Sib Sau Kab:Kev thauj cov roj av thiab cov nkev ntuj los ntawm lub qhov dej.
Tsawg- Cov kav xa hluav taws xob siab:Tsiv roj ntau dhau mus deb.
Dej Txhaj Kab:Nyob rau hauv cov roj teb rau theem nrab rov qab.
Piping rau lwm cov kua dej muaj:Xws li slurry, chav, thiab dej.
Kev siv tus qauv:Qee zaum siv rau piling, scaffolding, thiab cov qauv kev txhawb nqa (tab sis tsis yog nws qhov kev siv thawj zaug).
PSL1 vs. PSL2: Kev sib piv ceev
| Feature | PSL1 | PSL2 |
|---|---|---|
| Impact Toughness Test | Tsis xav tau | Yuav tsum tau |
| Max. Carbon sib npaug | Tsis Qhia | Limited (rau zoo weldability) |
| Max. Sulfur & Phosphorus | Kev txwv siab dua | Lower Limits (ntxuav hlau) |
| Tensile Test | Ntawm Yeeb Nkab, los yog Plate rau Welded | Ib txwm nyob ntawm Cov Yeeb Nkab Lub Cev |
| Hydrostatic Test Siab | qis | Siab dua |
| Nqi | qis | Siab dua |
| Daim ntawv thov | Lub hom phiaj dav dav, Tsawg-Risk | Siab siab, huab cua txias, tseem ceeb |
Xaus
API 5L Qib B PSL1yog ntau yam, kev lag luam, thiab dav siv cov pa roj carbon steel yeeb nkab haum rau ntau yam tsawg - mus rau - cov ntawv thov thauj cov kua dej nruab nrab. Nws qhov kev txwv tseem ceeb yog qhov tsis muaj kev lav phib xaub, ua rau nws tsis tsim nyog rau cov kev pabcuam uas tsis tshua muaj kub tuaj yeem ua rau tawg tawg. Rau cov kev siv tseem ceeb no,PSL2los yog qib siab dua liX42, X52, thiab lwm yam., yuav tau teev tseg.
